We Linked 150 of Ikea’s $10 Speakers to Make a Wall of Sound

An Ikea speaker claimed to support linking up to 150 units had never been tested at that scale, so a London team built a wall of them to find out. The test showed that the Kallsup speakers could be chained from a smartphone in large numbers, demonstrating an unusual multi-speaker feature in a product aimed at individual households.

One speaker arrived damaged, but the remaining 149 linked successfully in about 30 minutes. Each costs $10 and has a 1.8-inch driver and a 3-watt amplifier, giving the array a combined rated output of 447 watts. The sound became very loud, though the reviewer described it as alarm-like rather than hi-fi quality.